Philippe Delsarte Four Fundamental Parameters of a Code and Their Combinatorial Significance [Citation Graph (0, 0)][DBLP] Information and Control, 1973, v:23, n:5, pp:407-438 [Journal]
P. Nath, D. P. Mittal A Generalization of Shannon's Inequality and Its Application in Coding Theory [Citation Graph (0, 0)][DBLP] Information and Control, 1973, v:23, n:5, pp:439-445 [Journal]